Forward grasping grooves
"Full-length" guide rods
Two-tone color schemes
...are my pet peeves on 1911s. I hate them all. I've said all this before, many times, but since this is a new thread, I'll add my $.02...
Not one of those things is needful, helpful, attractive (IMNSHO) or necessary.
They're all examples of "gun fashion".
We know how some of them came about; the front serrations (like extended cocking handles on AR15s) were developed to accomodate slide manipulation with guns that had scope mounting hardware which obscured the rear grasping grooves, while the two-tone color schemes came about in early IPSC with folks who would hard-chrome the receiver to improve wear resistance there, but left the slide blued to minimize glare when sighting. Long recoil guide rods never did have a bona fide justification for existing in 1911s, and still don't, but they became common on IPSC guns in the '80s.
Some people who were easily influenced (IPSC wannabe groupies, that is), thought these things must be "cool" because "all the top shooters" (in IPSC, that is) had them, therefore these STUPID USELESS FEATURES became "fashionable", even though they served no purpose on a CCW or "real life" gun!
A further annoyance is that some of the features have been perverted (eg, two tone guns with white slides and dark frames, opposite the original pattern which had at least some purpose in a competition gun which shot 100,000 rounds a month).
All the new fullsize 1911s seem to be released with these fasion-trendy features as a matter of routine now! Screw 'em.